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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | 1x 1x 3x 3x 3x 3x 3x 840x 3x 1x | /** ****************************************************************************************************
* File: GeohashStreamGeoJSON.js
* Project: geohash
* @author Nick Soggin <iSkore@users.noreply.github.com> on 12-Feb-2019
*******************************************************************************************************/
'use strict';
const
GeohashStream = require( './GeohashStream' ),
toGeoJSON = require( './toGeoJSON' );
class GeohashStreamGeoJSON extends GeohashStream
{
/**
* GeohashStreamGeoJSON
*
* extends GeohashStream
*
* @param {object} opts - configuration object
* @param {number} opts.minLng - bbox min longitude
* @param {number} opts.minLat - bbox min latitude
* @param {number} opts.maxLng - bbox max longitude
* @param {number} opts.maxLat - bbox max latitude
* @param {number} opts.precision - geohash precision
* @param {boolean} [opts.includeGeohashAsProperty=false]
* include geohash string as a property in the GeoJSON
* @param {boolean} [opts.includeFeatureBBox=false]
* include bbox as a property in the GeoJSON
*/
constructor( opts )
{
super( opts );
this.opts = opts;
this.opts.includeGeohashAsProperty = this.opts.includeGeohashAsProperty || false;
this.opts.includeFeatureBBox = this.opts.includeFeatureBBox || false;
}
_read()
{
let chunk;
while ( ( chunk = super.nextChunk() ) !== null ) {
this.push( JSON.stringify( toGeoJSON( chunk, this.opts ) ) );
}
this.push( null );
}
}
module.exports = GeohashStreamGeoJSON;
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